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JavaScript Statements — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript Statements lesson. Every one is checked automatically in the browser — write the code, run it, and the tests tell you what still fails.

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Exercises(5)

  1. 1

    Run statements in order

    easy10 min

    Set a value, change it, then show the final one.

  2. 2

    Write a declaration statement

    easy10 min

    Declare a constant and display it.

  3. 3

    Use a conditional statement

    easy10 min

    Show "branching" when a flag is true.

  4. 4

    Use a loop statement

    easy10 min

    Loop three times and report "looped".

  5. 5

    Combine several statements

    medium10 min

    Declare, calculate and display in three statements.

Find the bug(5)

  1. 1

    Fix the statements in the wrong order

    easy8 min

    The value is displayed before it is updated.

  2. 2

    Fix the statement inside the wrong block

    easy8 min

    The display line only runs when the flag is false.

  3. 3

    Fix the incomplete statement

    easy8 min

    The assignment has no value on the right.

  4. 4

    Fix the loop count

    easy8 min

    The loop runs the wrong number of times.

  5. 5

    Fix the wrong operator in the calculation

    easy8 min

    Adding instead of multiplying gives the wrong total.

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